parameterized mvc 4 web api constructor using Ninject not working - asp.net-mvc-4

Question

I followed the instructions in this article to use Ninject for MVC 4 Web API Controller Constructor injection:
http://www.peterprovost.org/blog/2012/06/19/adding-ninject-to-web-api/
the problem that i am facing is when i call the api method i get error saying "Type 'CarController' does not have a default constructor".
i have even set break points at NinjectWebCommon.CreateKernel to see if that is being called. And that does get called when application runs.
Am i missing any thing?
by the way, i installed Ninject.Web.Common and Ninject from nuget for doing this. Here is my code:
MVC WEB API Controller:
public class CarController : ApiController
{
private ICarService carService;
public CarController(ICarService carService)
{
this.carService = carService;
}
[AcceptVerbs("GET")]
public CarsResponse GetCars([FromUri] CarsRequest request)
{
return this.carService.GetCars(request);
}
}
in App_Start:
public class NinjectDependencyScope : IDependencyScope
{
IResolutionRoot resolver;
public NinjectDependencyScope(IResolutionRoot resolver)
{
this.resolver = resolver;
}
public object GetService(Type serviceType)
{
if (resolver == null)
throw new ObjectDisposedException("this", "This scope has been disposed");
return resolver.TryGet(serviceType);
}
public System.Collections.Generic.IEnumerable<object> GetServices(Type serviceType)
{
if (resolver == null)
throw new ObjectDisposedException("this", "This scope has been disposed");
return resolver.GetAll(serviceType);
}
public void Dispose()
{
IDisposable disposable = resolver as IDisposable;
if (disposable != null)
disposable.Dispose();
resolver = null;
}
}
public class NinjectDependencyResolver : NinjectDependencyScope, IDependencyResolver
{
IKernel kernel;
public NinjectDependencyResolver(IKernel kernel)
: base(kernel)
{
this.kernel = kernel;
}
public IDependencyScope BeginScope()
{
return new NinjectDependencyScope(kernel.BeginBlock());
}
}
my NinjectWebCommon looks like this:
public static class NinjectWebCommon
{
private static readonly Bootstrapper bootstrapper = new Bootstrapper();
public static void Start()
{
DynamicModuleUtility.RegisterModule(typeof(OnePerRequestHttpModule));
DynamicModuleUtility.RegisterModule(typeof(NinjectHttpModule));
bootstrapper.Initialize(CreateKernel);
}
public static void Stop()
{
bootstrapper.ShutDown();
}
private static IKernel CreateKernel()
{
var kernel = new StandardKernel();
kernel.Bind<Func<IKernel>>().ToMethod(ctx => () => new Bootstrapper().Kernel);
kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();
RegisterServices(kernel);
GlobalConfiguration.Configuration.DependencyResolver = new NinjectDependencyResolver(kernel);
return kernel;
}
private static void RegisterServices(IKernel kernel)
{
kernel.Bind<ICarService>().To<CarService>();
}
}

Answer 1

I was having the same issue. I found the resolution by doing the following. I lost track of the webpage where I found the class NinjectMVCDependencyResolver.
/// <summary>
/// Creates the kernel that will manage your application.
/// </summary>
/// <returns>The created kernel.</returns>
private static IKernel CreateKernel()
{
var kernel = new StandardKernel();
kernel.Bind<Func<IKernel>>().ToMethod(ctx => () => new Bootstrapper().Kernel);
kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();
RegisterServices(kernel);
// Install our Ninject-based IDependencyResolver into the Web API config
GlobalConfiguration.Configuration.DependencyResolver
= new NinjectDependencyResolver(kernel);
// Install into the MVC dependency resolver
System.Web.Mvc.DependencyResolver.SetResolver(
new NinjectMVCDependencyResolver(kernel));
return kernel;
}
public class NinjectMVCDependencyResolver : NinjectDependencyScope
, System.Web.Mvc.IDependencyResolver
{
private IKernel kernel;
public NinjectMVCDependencyResolver(IKernel kernel)
: base(kernel)
{
this.kernel = kernel;
}
public IDependencyScope BeginScope()
{
return new NinjectDependencyScope(kernel.BeginBlock());
}
}